CHARGING CURVE
Bulk: This is the first stage (Constant Current) where the battery is in a low charge state. During this
stage the controller delivers all of the available solar power to the Battery system.
Float (Pulse mode, Maintenance): At the end of bulk stage, typically when the battery reaches 14.4
Volts, a maintenance mode starts where the battery voltage can float between a high and low value fixed
by the controller. These values are temperature compensated in order to keep the battery at 100% charge
stage in any condition.
PROTECTION FEATURES
Overcharge protection
Deep discharge protection
Battery under-voltage protection
Solar panel reverse current protection
The following installation faults do not destroy the controller. After correcting the fault, the
device will continue to operate correctly:
Overcharge protection
Deep discharge protection
Reverse polarity protection of load, panel and battery
Automatic electronic fuse
Short circuit protection of load and panel
Over voltage protection at panel input
Open circuit protection without battery
Reverse current protection at night
Overload protection
Battery over voltage shutdown
GROUNDING
Grounding ISC3020 is not technically required when installing a stand alone solar system. However, if
required, Common grounding of the negative Battery and Load control output is OK (for negative
earth electrical systems such as a caravan or motor-home).
Note: ISC3020 can ground the negative only, and PV array Output should NOT be grounded.
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